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feat(sptool): add StMM memory region descriptor

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StandaloneMM partition requires that the first memory region in its list
of reserved memory regions describe the full partition layout. Hafnium
SPMC checks that memory regions in FF-A manifest do not overlap.
Therefore, this region is added directly in HOB generation code rather
than as a memory region in the FF-A manifest for the StMM partition.

Signed-off-by: Kathleen Capella <kathleen.capella@arm.com>
Change-Id: Ia22174d755a5776e20ecf9639584f3c08cf9e60e
This commit is contained in:
Kathleen Capella 2025-02-13 11:52:36 -05:00
parent 49c6566331
commit 3553087796
1 changed files with 13 additions and 1 deletions
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14
tools/sptool/hob.py
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@ -312,6 +312,13 @@ def generate_mmram_desc(base_addr, page_count, granule, region_state):
return ("4Q", (physical_start, cpu_start, physical_size, region_state))
def generate_stmm_region_descriptor(base_addr, physical_size):
region_state = STMM_MMRAM_REGION_STATE_DEFAULT
physical_start = base_addr
cpu_start = base_addr
return ("4Q", (physical_start, cpu_start, physical_size, region_state))
def generate_ns_buffer_guid(mmram_desc):
return HobGuid(EfiGuid(*MM_NS_BUFFER_GUID), *mmram_desc)
@ -346,6 +353,12 @@ def generate_hob_from_fdt_node(sp_fdt, hob_offset, hob_size=None):
if img_size is None:
img_size = 0x0
regions = []
# StMM requires the first memory region described in the
# MM_PEI_MMRAM_MEMORY_RESERVE_GUID describe the full partition layout.
regions.append(generate_stmm_region_descriptor(load_address, img_size))
if sp_fdt.exist_node("memory-regions"):
if sp_fdt.exist_property("xlat-granule"):
granule = int(sp_fdt.get_property("xlat-granule").value)
@ -353,7 +366,6 @@ def generate_hob_from_fdt_node(sp_fdt, hob_offset, hob_size=None):
# Default granule to 4K
granule = 0
memory_regions = sp_fdt.get_node("memory-regions")
regions = []
for node in memory_regions.nodes:
base_addr = get_integer_property_value(node, "base-address")
page_count = get_integer_property_value(node, "pages-count")